The border begins in the west at the western tripoint with China, located just east of the China–Kazakhstan–Russia tripoint. It then proceeds overland in a broadly north-east direction through the
Altai Mountains, up to the vicinity of Mongolia's
Uvs Lake, briefly cutting into the lake so as to leave the far north-eastern corner in Russia. The border then proceeds eastwards via a series of overland lines, angled slightly to the south-east; this section also cuts across Lake Tore-Khol. The border then turns north across the
Ulaan Taiga mountains, forming a broad arc through the
Sayan Mountains around Mongolia's
Lake Khövsgöl. The border continues overland eastwards, arching broadly north (a short part of which utilises the
river Chikoy) and then south in two long arcs, before turning north-east and then east, skirting south of Russia's Lake Barun-Torey, to terminate at the eastern Chinese tripoint.
Tripoints The eastern and western end points of the Mongolia–Russia border are
tripoints, i.e. junctions with the
China–Russia border and the
China–Mongolia border. A special trilateral agreement, signed on January 27, 1994, in
Ulaanbaatar, determines the location of these two tripoints. The agreement is based on earlier bilateral treaties between the parties involved. The trilateral agreement specifies that a
border monument was to be erected at the eastern tripoint, called Tarbagan-Dakh (Ta'erbagan Dahu, Tarvagan Dakh); The border monument and the access roads for it are visible on Google Maps, at approximately . due to its remote and hard to access location, on a mountain covered with perpetual snows. ==History==